JPH05109471A - Cylinder liner heating device - Google Patents

Abstract

PURPOSE:To shorten the heating time and facilitate the insertion into or removal from a heating chamber of cylinder liners by providing an induction heating furnace having multiple furnace bodies and a carrying-in/out device having multiple clamp devices. CONSTITUTION:Cylinder liners W are set on work support members on the cover body 28 of a high-frequency induction heating furnace 21. Clamp devices 14, 14 are moved on the heating furnace 21, lift cylinders 16 fitted with jig loaders 18, clamp jigs 19, and clamp claws 20 and the operating cylinder 30 of the cover body 28 are expanded and shortened, and the liners W are stored in heating chambers of furnace bodies 23. After the liners W are heated, the cylinders 16, 30 are again expanded and shortened, the liners W are extracted from the heating chambers and moved along a guide rail 13, and they are set to the preset position of a liner setter 31. The liners W can be heated in a short time by the induction heating furnace 21, and the setting work and the extracting work can be easily performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylinder liner heating device for integrally casting a cylinder liner, for example, when casting a cylinder block.

[0002]

2. Description of the Related Art Conventionally, when a cylinder block 1 of this type is cast, a plurality of cylinder liners 2 are integrally cast. Therefore, the cylinder liner 2 is heated to a predetermined temperature to cause a temperature difference. In order to eliminate quality defects such as cracks and sink marks, the cylinder liner 2 was heated by a heater furnace.

[0003]

However, since the heating is performed by the radiant heat of the nichrome wire in the heater furnace,
There are problems that it takes time to raise the temperature, it is difficult to control the temperature, the thermal efficiency is poor, and the space is large.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and can heat a cylinder liner in a short time, and temperature control is easy,
It is an object of the present invention to provide a cylinder liner heating device which has good thermal efficiency and can be easily inserted into and taken out of the heating chamber of the cylinder liner.

[0005]

In order to solve the above technical problems, the present invention is a cylinder liner heating device comprising a loading / unloading device and an induction heating furnace, wherein the loading / unloading device introduces a plurality of clamp devices into the induction device. It is movably provided above the heating furnace, and a plurality of clamp jigs are provided in the clamp device so as to be movable up and down. The induction heating furnace is provided with a plurality of furnace bodies corresponding to the clamp device. Is provided with a heating chamber for accommodating a single or a plurality of cylinder liners, an induction coil is disposed on the inner peripheral wall of the heating chamber, and a lid is provided on the upper side of the plurality of furnace bodies so that each heating chamber can be opened and closed. A cylinder liner heating device is provided which is provided on the upper surface side of the lid body so as to be aligned with the heating chamber and in which the work supporting member is arranged so that the cylinder liner can be set.

[0006]

With the above structure, the cylinder liner can be easily inserted into and taken out from the heating chamber.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows an entire cylinder liner heating device 10. The heating device 10 carries in and out a cylinder liner W and an unloading device 11, for example. It is composed of a high frequency induction heating furnace 21.

The carry-out device 11 is provided with a plurality of columns 12 having a predetermined height, and a guide rail 13 that horizontally projects from the upper ends of the columns 12 in a cantilever shape and faces above the heating furnace 21. On the guide rail 13, a plurality of (two in this example is illustrated) clamp devices 1 are provided.
4 are provided.

The clamp device 14 is constructed in substantially the same shape, and the device 14 is moved up and down along the guide rail 13 and is vertically moved with the piston rod 17 facing downward to the movable body 15. A cylinder 16 is provided, a jig loader 18 is attached to the tip of the piston rod 17, and a jig loader 18 is provided below the jig loader 18 so that the cylinder loader 18 can open and close the cylinder liner W. A plurality of clamp jigs 19 having clamp claws 20 that are inserted, opened, and gripped are provided. The clamp device 14 thus provided is provided so as to be movable along the guide rail 13.

Further, the high frequency induction heating furnace 21 is disposed below the tip of the guide rail 13, and the heating furnace 21 has a control box 22 in which an induction heating power source such as a high frequency generator or a high frequency motor generator is installed. And a plurality of furnace bodies 23 provided on the box 22 (two cases are illustrated in this example), and a lid body 28 that closes the upper portions of the plurality of furnace bodies 23.

The furnace body 23 is formed of, for example, a plastic refractory material into a substantially rectangular parallelepiped, and the furnace body 23 has a plurality of eyeglass-shaped heating chambers 24 capable of accommodating, for example, two cylinder liners W. An induction coil 25 relayed to the control box 22 is arranged along the inner peripheral wall of the heating chamber 24 (which is illustrated as being provided in two places in this example).

The heating chamber 2 of the furnace body 23 thus formed
4, the induction current is generated in the cylinder liner W by the electromagnetic induction action by inserting the cylinder liner W into the induction coil 25 and energizing the induction coil 25, as shown in FIG.
Are heated by the overcurrent loss that occurs in each heating chamber 2
4 is provided with a temperature sensor so as to automatically control the temperature, and a large current flows through the induction coil 25, which causes a temperature rise. It is configured to flush water. The furnace body 23 thus provided is arranged on the control box 22, and a lid body 28 is provided so that the upper portion of the furnace body 23 can be opened and closed via a sliding frame 27.

The lid 28 is formed in a box-like shape having a substantially rectangular downward opening so that the upper portions of the two furnace bodies 23 can be opened and closed, and the refractory T is attached in a filling shape. Ferrite cement F is applied to block the above. Further, when the upper portions of the furnace bodies 23, 23 are closed by the lid body 28 on the upper surface side of the lid body 28, the cylinder liner W is vertically supported at a position aligned with a position where the cylinder liner W of the heating chamber 24 is housed. Work supporting members 29 are attached. The lid 28 formed in this manner is linked by an operating cylinder 30 and is provided so as to be movable along the sliding frame 27.

The clamp jig 19 provided below the jig loader 18 of the clamp device 14 is provided so as to be aligned with the work support member 20 and the storage position of the liner W in the heating chamber 24.

In order to heat the cylinder liner W by the cylinder liner heating device 10 configured as described above, first, the lid 28 of the high frequency induction heating furnace 21 is operated by the operating cylinder 3
The furnace bodies 23, 23 are in a closed state with 0 shortened. In this state, the worker sets the cylinder liner W on each work supporting member 29 provided on the lid 28.

After setting the cylinder liner W, the clamp devices 14 and 14 are moved onto the heating furnace 21, and each furnace body 2 is moved.
3 is positioned at a predetermined position. As a result, the elevating cylinder 16 is extended, the jig loader 18 and the clamp jig 19 are integrally lowered, and the clamp claw 20 of each clamp jig 19 is stopped when it is inserted into the inner diameter portion of the target cylinder liner W. To be done. Due to this stop, the clamp claw 20 is expanded by the jig loader 18 and the cylinder liner W is clamped in a stretched manner. By this clamp, the lifting cylinder 16 is shortened to a predetermined position, whereby the working cylinder 30 of the lid body 28 is extended and the lid body 28 is moved, and the heating chamber 24 of the furnace body 23 is opened.

Thereafter, the elevating cylinders 16 are extended and clamped, and each of the clamped cylinder liners W is housed in the target heating chamber 24 and stopped. As a result, each clamp claw 20 is unclamped by the jig loader 18, the lifting cylinder 16 is shortened, and the jig loader 18 and the clamp jig 19 stand by above.
On the other hand, the operating cylinder 30 of the lid 28 is shortened and the heating chamber 24 is closed.

With the closing of the heating chamber 24, the induction coil 25 is energized, the cylinder liner W is heated to approximately 600 ° C., and then maintained at 600 ° C.

When the induction coil 25 is de-energized in response to a signal from the cylinder block casting machine, the lid 28 is closed.
The operating cylinder 30 is extended and the heating chamber 24 is opened. When the heating chamber 24 is opened, the elevating cylinder 16 of the clamp device 14 that is on standby upward is extended to lower the jig loader 18 and the clamp jig 19, and the clamp claw is again attached to the inner diameter portion of the target cylinder liner W. Two
0 is inserted to clamp it. Then, the cylinder 16 is shortened again and moves upward, moves along the guide rail 13 toward the support, and is stopped at a predetermined position with respect to the liner setter 31 which is waiting below, and the lift cylinder 16 is extended again. The cylinder liner W is set at a predetermined position on the liner setter 31, and is unclamped to move up.

The liner setter 31 in which the cylinder liner W is set is carried out to the casting machine side, while the heating furnace 21
On the side, when the heated cylinder liner W is clamped and lifted, the operating cylinder 30 is actuated and the heating chamber 24 is closed, and while the cylinder liner W is set on the liner setter 31 by the clamp device 14, the worker supports the work. The cylinder liner W is set on the member 29, and thereafter, the cylinder liner W is sequentially heated by operating in the above-described operation order.

As described above, since the cylinder liner heating device 10 of this embodiment is provided with the high frequency induction heating furnace 21, the heating efficiency is high, the temperature can be easily controlled, and the cylinder liner can be operated in a short time. W can be heated,
Further, a lid 28 is provided so that the heating chamber 24 of the furnace body 23 can be opened and closed, and a work support member for setting the cylinder liner W on the upper surface side of the lid 28 at the same position as the position where the cylinder liner W is housed in the heating chamber 24. Since 29 is provided, the clamp device for the heating chamber 24 facilitates the setting work and the taking-out work, and it is convenient to perform the next preparatory work by utilizing the carry-out time of the cylinder liner W.

In the above embodiment, the high frequency induction heating furnace 21 is exemplified, but the present invention is not limited to this, and a low frequency one may be used. Further, although the configuration in which the two cylinder liners W are housed in the heating chamber 24 has been illustrated, the present invention is not limited to this, and one cylinder liner W may be housed.

[0023]

As described above, according to the present invention, the induction heating furnace is arranged by the above-mentioned structure, so that the heating efficiency is high, the temperature can be controlled easily, and the cylinder liner can be operated in a short time. W can be heated and a lid is provided that can open and close the heating chamber of the furnace body, and the work support that sets the cylinder liner at the same position as the position where the cylinder liner is placed in the heating chamber on the upper side of this lid Since the members are arranged, the clamp device for the heating chamber facilitates the setting work and the taking-out work, and it is convenient to carry out the next preparation work by utilizing the carry-out time of the cylinder liner.

[Brief description of drawings]

FIG. 1 is an overall view of a cylinder liner heating device.

FIG. 2 is a front view of an induction heating furnace.

FIG. 3 is also a plan view of the induction heating furnace.

FIG. 4 is a sectional view of an induction heating furnace.

FIG. 5 is an explanatory diagram of induction heating.

FIG. 6 is a perspective view of a cylinder block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Cylinder liner heating device 11 Loading / unloading device 14 Clamping device 19 Clamp jig 21 High frequency induction heating furnace 23 Furnace body 24 Heating chamber 25 Induction coil 28 Lid body 29 Work support member W Cylinder liner

Claims (1)

[Claims] 1. A cylinder liner heating device comprising a loading / unloading device and an induction heating furnace, wherein the loading / unloading device is provided with a plurality of clamp devices movably above the induction heating furnace. A plurality of clamp jigs are provided to be movable up and down, the induction heating furnace is provided with a plurality of furnace bodies corresponding to the clamp device, and each furnace body is provided with a heating chamber for accommodating a single or a plurality of cylinder liners, An induction coil is arranged on the inner peripheral wall of the heating chamber, a lid is provided on the upper side of the plurality of furnace bodies so that each heating chamber can be opened and closed, and the upper side of the lid is aligned with the heating chamber. Cylinder liner heating device in which a work supporting member is arranged so that the cylinder liner can be set.